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Spencer, D. W., Robertson, D. E., Turekian, K. K., and Folsom, T. R., 1970. Trace element calibrations and profiles at the Geosecs test station in the Northeast Pacific Ocean. J. Geophys. Res. 75: 7688.

Brewer, P. G., Spencer, D. W., and Robertson, D. E., 1972. Trace element profiles from the GEOSECS-II test station in the Sargasso Sea. Earth Planet. Sci. Lett. 16: 111-116.